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Alignment and Position Sensors Based on Split Ring Resonators

2012; Multidisciplinary Digital Publishing Institute; Volume: 12; Issue: 9 Linguagem: Inglês

10.3390/s120911790

1424-8220

Jordi Naqui, Miguel Durán‐Sindreu, Ferran Martı́n,

Microwave Engineering and Waveguides

In this paper compact alignment and position sensors based on coplanar waveguide (CPW) transmission lines loaded with split ring resonators (SRRs) are proposed. The structure consists of a folded CPW loaded with two SRRs tuned at different frequencies to detect both the lack of alignment and the two-dimensional linear displacement magnitude. Two additional resonators (also tuned at different frequencies) are used to detect the displacement direction. The working principle for this type of sensor is explained in detail, and a prototype device to illustrate the potential of the approach has been designed and fabricated.